JPH01317793A - Pencil sharpener - Google Patents

Abstract

PURPOSE:To obtain a safe sharpener whose motor is not started when a manual handle is in a use state by providing a link member for displacing a switch device so as to move an actuator to the outside of the moving region of a pencil detection member when the manual handle is displaced to a use state. CONSTITUTION:When a manual handle 9 is erected, a clutch plate 12 is moved to be brought into contact with the side surface of a gear 4 under pressure and the rotatory power of the manual handle 9 can be transmitted to a cutter 5. At the same time, a shaft 13 is pushed to protrude toward a switch device 15 and pushes the switch device 15 to move the same. When a pencil is inserted in a pencil receiving part 6, a pencil detection member 19 is pushed by the pencil to recede. Since the switch device 15 is moved while being pushed by the shaft 13, the actuator 16 of the switch device 15 is not pushed even when the pencil detection member 19 recedes and a motor 1 is not started. Even if the manual handle 9 is received in such a state that the pencil is inserted, the motor 1 is not started.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a pencil sharpener.

BACKGROUND OF THE INVENTION Electric pencil sharpeners are typically equipped with a pencil detection switch device that starts a motor upon detecting the insertion of a pencil.

By the way, it would be very convenient to have a manual handle attached to such an electric device so that it can be operated by hand. However, since it would be inconvenient for the manual handle to rotate while being operated by the motor, a clutch is provided between the manual handle and the cutter to transmit or cut off power, for example, when the manual handle is stored. It is conceivable that the clutch be configured so that it is in a disengaged state.

Problems to be Solved by the Invention However, when attempting to provide the pencil detection switch device in a device equipped with a manual handle, the following problems arise. In other words, even if you use the manual handle to sharpen a pencil, inserting the pencil will cause the pencil detection switch device to become conductive, and if the power outlet is plugged in at this time, the motor will start. ,
This rotation is transmitted to the manual handle, which is dangerous.

The present invention has been made in view of the above-mentioned problems, and the present invention aims to solve the above-mentioned problems. A link member is provided which makes a switch device for operating the motor movable, and which moves the switch device when the manual handle is put into use, thereby cutting off the relationship between the pencil detection member and the switch device.

Operation With the above structure, when the manual handle is raised, the pencil detection switch device moves, and even when a pencil is inserted, the pencil detection switch device does not operate.

EXAMPLE Hereinafter, an example of a pencil sharpener according to the present invention will be described. In Fig. 1, 1 is a motor, 2 is a reduction gear,
3 is a rotary shaft for rotating the cutter, and 4 is a gear fixed to the rear end of the rotary shaft 3 and meshed with the reduction gear 2. 5 is a cutter having a windmill shape as shown in FIG.
is fixed. 6 is a pencil accommodating portion that becomes narrower toward the tip. As shown in FIG. 2, an open lower portion is formed in the portion of the pencil accommodating portion 6 facing the cutter 5, and a portion of the pencil inserted into the pencil accommodating portion 6 protrudes from the open lower portion. In addition, the cutter 5 rotates very close to the opening lower part, and hits the pencil protruding from the opening lower part.
It's structured like sharpening a pencil. Reference numeral 8 denotes a pencil feeding device which is provided on the upper part of the pencil accommodating part 6 and feeds the pencil inserted into the pencil accommodating part 6 while rotating it. 9 is a manual handle for manually rotating the cutter 5; 10 is a handle holding plate rotatably held coaxially with the rotating shaft 3; It is rotatably mounted. 11
12 is a clutch lever rotatably held on the back side of the handle holding plate 10, and 12 is a clutch plate held slidably in the center of the handle holding plate 10 as shown by arrow B. The tip engages with an engagement portion formed on the back side of the clutch plate 12. When the manual handle 9 is raised as shown in FIG. 6, the rear end 9a of the manual handle 9 hits the clutch lever 11 and pushes it open.
2, the clutch plate 12 is pressed against the side surface of the gear 4.

13 is a shaft held slidably, and 14 is a shaft holding portion that holds the shaft 13. shaft 1
One end of the clutch plate 3 can come into contact with the clutch plate 12. 1
5 is a switch device for starting the motor 1; when the actuator 16 is pressed, internal contacts are closed and a power supply voltage is applied to the motor 1; Switch device 15 is connected to shaft 17
The switch device 15 is rotatably held in the spring 1.
8 in the direction of arrow C. When the switch device 15 rotates in the direction of arrow C, the back surface of the switch device 15 comes into contact with the other end of the shaft 13. 19
is a pencil detection member that is slidably provided. The pencil detection member 19 is biased in the direction of the arrow, that is, toward the pencil insertion portion 6, by a spring (not shown), and the tip of the pencil detection member 19 projects into the pencil insertion portion 6. When the pencil is inserted, the pencil detection member 19 is pushed back by the pencil. At this time, if the switch device 15 is in the state shown in FIG. 3, when the pencil detection member 19 is moved back, the back surface of the pencil detection member 19 will hit the actuator 16 and push the actuator 16.

The operation will be explained below. FIG. 4 shows an unused state. In this state, the clutch plate 12 is retracted, there is nothing supporting the shaft 13, and the switch device 15 is in its normal position.

When the pencil is inserted into the pencil accommodating portion 6, the pencil detecting member 19 is pushed by the pencil, as shown in FIG. 5, and the actuator 16 of the switch device 15 is pushed. When the actuator 16 is pressed, the motor 1 starts,
The cutter 5 rotates. Furthermore, when the pencil is removed, the actuator 16 returns to its original position and the motor l stops.

Here, when the manual handle 9 is raised as shown in FIG. 6, the clutch plate 12 moves and comes into pressure contact with the side surface of the mower 4, making it possible to transmit the rotational force of the manual handle 9 to the cutter 5. At the same time, the shaft 13 is pushed and protrudes toward the switch device 15, and the shaft 13 pushes the switch device 15, causing the switch device 15 to move as shown in FIG. When the pencil is inserted into the pencil accommodating portion 6, the pencil detecting member 19 is pushed by the pencil and retreats as shown in FIG. However, switch device 1
5 is moved by being pushed by the shaft 13, even if the pencil detection member 19 retreats, it does not push the actuator 16 of the switch device 15, and the motor 1 does not start. When the manual knob 9 is retracted, the clutch plate 1
2 retreats, and there is nothing to support the shaft 13, and the switch device 15 returns to its original position by the repulsive force of the spring 18.

By the way, if the user stores the manual handle 9 without taking out the pencil while it is being used manually, that is, the manual handle 9 is raised and the pencil is inserted into the pencil accommodating part 6. , the state shown in FIG. 8 is reached. For example, after a pencil has been sharpened, the user may store the manual handle 9 before removing the pencil, but if the motor starts when the manual handle 9 is retracted, the user will be panicked. . Therefore, in this embodiment, even if the manual handle 9 is retracted with the pencil still inserted, the motor 1 is not activated. That is, the switch device 15 is about to return to its original position due to the repulsive force of the spring 18, but the actuator 16
hits the pencil detection member 19, and the switch device 15 cannot return to its original position. However, the switch W115 returns to its original position after the pencil is removed.

FIG. 9 shows another embodiment. In FIG. 9, 20 is an indirect lever provided in place of the shaft 13 in the previous embodiment. In the previous embodiment, there was no obstacle between the clutch plate 12 and the switch device 15, so the straight shaft 13 was provided, but if there was an obstacle, it was necessary to avoid the obstacle as in this embodiment. What is necessary is just to provide the member formed in . Similarly to the shaft 13, the indirect lever 20 also has one end in contact with the clutch plate 12 and the other end in contact with the back surface of the switch device 15. When the manual handle 9 is raised, the indirect lever 20 is pushed and moved, and the indirect lever 20 moves the switch device 15.

In the above embodiment, the switch device 15 is rotatably held, but the switch device 15 may be configured to slide.

Effects of the Invention As described above, the present invention makes the switch device for operating the motor movable, and moves the switch device when the manual handle is moved to the use state, thereby moving the actuator to the pencil detecting member. By providing a link member that can be removed from the moving area, when the manual handle is in use, the pencil detection switch device is moved so that it does not operate, and even if a pencil is inserted, the pencil detection switch device is not activated. The member will not push the actuator (and the motor will not start), making it very safe.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a pencil sharpener in an embodiment of the present invention;
Figure 2 is a front view of the pencil sharpener, Figure 3 is a perspective view showing the pencil detection switch device of the pencil sharpener, Figures 4, 5, 6, 7, and 8 are FIG. 9 is a plan view of the main parts of the pencil sharpener according to another embodiment of the present invention. ■・・・Motor 2・・・Deceleration gear 3
...Rotating shaft 5...Cutter〇...
...Pencil storage section 9...Manual handle 10.
... Handle holding plate 11 ... Clutch lever 12 ... Clutch plate 13 ... Shaft 14
... Shaft holding part 15 ... Switch device 16 ... Actuator 17 ... Shaft 18 ...
...Spring 19...Pencil detection member Name of agent Patent attorney Toshio Nakao and one other person Figure 1 School Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] a cutter driven by a motor; a guide means for guiding a pencil toward the cutter; a handle capable of being in a stored state and a used state; It has a power transmission means for transmitting power to the cutter, and a pencil detection member that is pushed by a pencil that is inserted while being guided by the guide means, and is configured to be able to displace a switch device that starts the motor when the actuator is pushed. A pencil sharpener characterized in that a link member is provided for displacing the switch device so that the actuator moves out of the movement range of the pencil detecting member when the manual handle is shifted to a use state.